Sea-Dog Gas Filled Lift Spring - 15" - 40#

The Sea-Dog Gas Filled Lift Spring – 15" – 40# is a precision hydraulic support component engineered for reliable hood, tonneau cover, and hatch operation in marine, RV, and automotive applications. Built to OEM marine standards, this gas spring eliminates the need for manual prop supports and delivers consistent lift force across thousands of duty cycles. Whether you're upgrading an older vehicle, RV, or marine enclosure, this component transforms accessibility and safety by providing smooth, controlled opening assistance without the wear and fatigue of traditional mechanical springs.

Gas-filled lift springs operate on sealed nitrogen pressurization, delivering a constant 40-pound force output throughout their full 15-inch stroke. Unlike coil or leaf springs, gas springs maintain linear resistance, preventing sudden drops or slamming and extending component life. The sealed cartridge design resists corrosion and moisture intrusion—critical in marine and outdoor environments where salt spray and humidity accelerate degradation. Sea-Dog's two-year warranty covers manufacturing defects and performance loss, reflecting confidence in their durable construction and long-term reliability across demanding applications.

This lift spring suits boat tonneau covers, RV exterior storage compartments, automotive hoods, and equipment access doors where smooth, hands-free operation is valued. The 40# force rating handles moderate-weight panels without over-stressing hardware or creating safety hazards during installation or removal. Installation requires basic hardware compatibility verification and secure mounting at both anchor points to ensure proper stroke alignment and maximum service life. Verify mounting hole spacing and load requirements before ordering to guarantee seamless integration with your specific application.